Nicholas Reback

Under gravel filter 

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medical illustration of Explanation of aerobic biological filtration for under gravel filters in small fresh water aquariums. Created for the National Aquarium in Baltimore, Maryland.
Next medical illustration of Explanation of aerobic biological filtration for in a biotower used for large fresh water aquariums. Created for the National Aquarium in Baltimore, Maryland.

Biotower filter

Explanation of aerobic biological filtration for under gravel filters in small fresh water aquariums. Created for the National Aquarium in Baltimore, Maryland.

Keywords: Color, Information Graphics, Education, Museum / Zoo, Publishing, Biology, Natural Science / Nature

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